CN1328168C - Collosol of yttrium barium cupper oxygen superconducting film and process for preparing high temp. superconducting film thereof - Google Patents
Collosol of yttrium barium cupper oxygen superconducting film and process for preparing high temp. superconducting film thereof Download PDFInfo
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- CN1328168C CN1328168C CNB2005100963927A CN200510096392A CN1328168C CN 1328168 C CN1328168 C CN 1328168C CN B2005100963927 A CNB2005100963927 A CN B2005100963927A CN 200510096392 A CN200510096392 A CN 200510096392A CN 1328168 C CN1328168 C CN 1328168C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
The present invention discloses sol used for yttrium barium copper oxygen high temperature superconducting films and a preparation method for the high temperature superconducting films. The present invention adopts acetic acid yttrium, barium acetate and cupric acetate as raw materials, and the raw materials of effective components for preparing the sol have the mol ratio: the acetic acid yttrium: the barium acetate: the cupric acetate: trifluoroacetic acid: water: alpha-methacrylic acid: diethyleneriamine: carbinol =1: 2: (3 to 4): (4 to 10): (20 to 160): (6 to 40): (1.5 to 5): (60 to 240). The sol has the advantages of low fluorin content, easy preparation of components, good chemical stability and simple preparing process. The adoption of the sol for preparing yttrium barium copper oxygen high temperature superconducting films has the advantages for obviously shortening the technology time of heat treatment and improving the technological repeatability. The method can be used for preparing YBCO films with large area, and the obtained YBCO films have the advantages of low porosity, good surface smoothness and favorable superconducting characteristic.
Description
Technical field
The present invention relates to a kind of thin-film material in microelectronics and material field, relate to relevant superconducting thin film and preparation method thereof, specifically, is a kind of colloidal sol of yttrium barium copper oxide superconducting film and the method for preparing high-temperature superconducting thin film thereof.
Background technology
The chemical formula of yttrium barium copper oxide is YBa
2C
U3O
7-x, be abbreviated as YBCO.The yttrium barium copper oxide film can be used for microelectronic, the various height of making, essence, sharp electron device, such as superconducting quantum interference device (SQUID) (SQUID), superconducting-coupled antenna (Antenna-coupled), superconductor detector (Superconductorbolometric detectors) etc.
The preparation ybco film mainly adopts methods such as PLD, MOCVD, magnetron sputtering at present, but will relate to expensive vacuum apparatus.In recent years, collosol and gel (sol-gel) method more and more is subject to people's attention.Yet, be starting raw material when preparing ybco film with metal alkoxide or other not fluorine-containing inorganic salt, in heat treatment process, be easy to form BaCO
3Phase causes Y
2BaCuO
5(211), the generation of dephasigns such as CuO, and hinder the formation of YBCO phase, thereby, utilize trifluoroacetate (TFA) for precursor prepares deposition of metal organic (MOD) method of ybco film, be called for short the TFA-MOD method, preparation ybco film technology more and more comes into one's own.Yet the TFA-MOD method has the defective of itself, this technology is with yttrium, barium, the trifluoroacetate of three kinds of metals of copper obtain precursor solution (all-TFA solution) after being dissolved in suitable solvent, and the gel-film that coating obtains in certain substrate will be through the thermal treatment in two stages.In the fs of heat treatment process, both the thermolysis stage, gel-film had decomposed a large amount of HF of generation, influenced the surface quality of film, and produced a large amount of holes in film inside, even reacted with substrate, finally influenced the supraconductivity of film.Therefore, in thermal decomposition process, need to adopt the means thermolysis that heats up at a slow speed, so that the acquisition surface quality is good and the film of dense structure.Yet this means length often consuming time that heats up at a slow speed for preparation YBCO thick film, needs repeatedly to repeat " plated film-thermolysis " process, makes that like this preparation technology's cycle is longer.
Summary of the invention
Prepare the problem that the yttrium barium copper oxide film exists at sol-gel method, the objective of the invention is to, providing a kind of is raw material with non-alkoxide, is used to prepare the colloidal sol of YBCO superconducting thin film and adopts this colloidal sol to prepare the method for high-temperature superconducting thin film.The present invention adopts the acetic acid yttrium, barium acetate, neutralized verdigris is a raw material, and in the process of this colloidal sol of preparation, has only barium salt and trifluoroacetic acid to react, fluorine content is lower in the colloidal sol, chemical stability is good, and its colloidal sol preparation process is simple, adopts the high-temperature superconducting thin film of this colloidal sol preparation, the thermal treatment process time significantly shortens, and has good superconducting characteristic.
In order to realize above-mentioned task, the present invention takes following technical solution:
The colloidal sol that a kind of Yt-Ba-Cu-O high-temperature superconductive film is used, it is characterized in that, make this colloidal sol raw materials of effective components and mol ratio thereof and be: acetic acid yttrium: barium acetate: neutralized verdigris or copper hydroxide: trifluoroacetic acid: water: α-Jia Jibingxisuan or propionic acid: diethylenetriamine or thanomin or diethanolamine or trolamine: methyl alcohol or ethanol=1: 2: (3～4): (4～10): (20～160): (6～40): (1.5～5): (60～240).
Realize the preparation method of the colloidal sol that above-mentioned Yt-Ba-Cu-O high-temperature superconductive film is used, it is characterized in that, comprise the following steps:
The colloidal sol that a kind of Yt-Ba-Cu-O high-temperature superconductive film is used, it is characterized in that, make this colloidal sol raw materials of effective components and mol ratio thereof and be: acetic acid yttrium: barium acetate: neutralized verdigris or copper hydroxide: trifluoroacetic acid: water: α-Jia Jibingxisuan or propionic acid: diethylenetriamine or thanomin or diethanolamine or trolamine: methyl alcohol or ethanol=1: 2: (3～4): (4～10): (20～160): (6～40): (1.5～5): (60～240).
A kind of preparation method of high-temperature superconducting thin film is characterized in that, this method comprises the following steps:
1) colloidal sol that adopts Yt-Ba-Cu-O high-temperature superconductive film to use is precursor liquid, is coated in conjunction with dip-coating method or spin-coating method on the single crystal substrate such as lanthanum aluminate, can obtain gel film;
2) again the prepared gel film is carried out the thermal treatment of following mode:
A. the gel-film that obtains is carried out fs thermal treatment, i.e. thermal decomposition process, its method is: at exsiccant O
2150 ℃-200 ℃ are incubated 10-30 minute in the atmosphere, are 1～8% O subsequently at water vapor pressure
2In the atmosphere, be warmed up to 400 ℃～450 ℃ with speed, and be incubated 0～30 minute, cool to room temperature with stove subsequently greater than 10 ℃/min;
B. the film after will handling through above-mentioned steps A is in the oxygen-nitrogen mixture body of 0.01-5% in oxygen level, be rapidly heated 750 ℃～850 ℃, be to be incubated 1～6 hour under 1～8% the condition at water vapor pressure, subsequently, keep the oxygen level of atmosphere constant, atmosphere is switched to the exsiccant oxygen-nitrogen mixture, continue insulation after 10-30 minute, cool to 550 ℃ with stove, gas is switched to pure O
2, and, cool to room temperature with stove at last 450 ℃ of insulations 2-8 hour, can obtain the superconducting thin film of critical temperature 80～90K;
The colloidal sol that Yt-Ba-Cu-O high-temperature superconductive film of the present invention is used, can be used to prepare yttrium barium copper oxide superconducting film, this colloidal sol preparation process is simple, and fluorine content is low, and composition is easily transferred, chemical stability is good, thereby make the heat treatment time of film shorten greatly, the process repeatability height can be used for preparing big area YBCO film, the YBCO membrane porosity that obtains is low, and surface smoothness is good.
Description of drawings
Fig. 1 is a gel-film thermal decomposition process synoptic diagram;
Fig. 2 is the calcining and the annealing process synoptic diagram of film.
The embodiment that provides below in conjunction with accompanying drawing and contriver is described in further detail content of the present invention.
Embodiment
The colloidal sol that the Yt-Ba-Cu-O high-temperature superconductive film that the present invention makes is used, its raw materials of effective components and mol ratio thereof are: acetic acid yttrium: barium acetate: neutralized verdigris or copper hydroxide: trifluoroacetic acid: water: α-Jia Jibingxisuan or propionic acid: diethylenetriamine or thanomin or diethanolamine or trolamine: methyl alcohol or ethanol=1: 2: (3～4): (4～10): (20～160): (6～40): (1.5～5): (60～240);
2) the acetic acid yttrium is dissolved in methyl alcohol or the ethanol, add a small amount of diethylenetriamine or thanomin or diethanolamine or trolamine, make the acetic acid yttrium: methyl alcohol or ethanol: diethylenetriamine or thanomin or diethanolamine or trolamine=1: (10～40): (1.5～5) form solution A after stirring;
3) barium acetate is dissolved in the mixing solutions that contains water and trifluoroacetic acid, make barium acetate: water: trifluoroacetic acid=1: (10～80): (2～5), after the stirring and dissolving, through 65 ℃～85 ℃ oven dry, products therefrom is dissolved in methyl alcohol or the ethanolic soln, makes mol ratio Ba
2+: methyl alcohol or ethanol=1: (10～40) obtain solution B;
4) neutralized verdigris or copper hydroxide are dissolved in methyl alcohol or the ethanol, add a spot of α-Jia Jibingxisuan or propionic acid, make neutralized verdigris or copper hydroxide: methyl alcohol or ethanol: α-Jia Jibingxisuan or propionic acid=1: (10～40): (2～10), stir the back through low-grade fever and form solution C;
5) with above-mentioned steps 2)～solution A that step 4) obtains, B, C mix, and stirs, and makes the mol ratio of yttrium, barium, copper three metal ion species be: Y
3+: Ba
2+: Cu
2+=1: 2: (3～4) can obtain required colloidal sol.
Adopting this colloidal sol is precursor liquid, can prepare yttrium barium copper oxide superconducting film, is coated on the lanthanuma luminate single crystal substrate in conjunction with soaking juice crystal pulling method or spin-coating method, can obtain gel film;
The gel-film that obtains is carried out fs thermal treatment, i.e. thermal decomposition process: at exsiccant O
2150 ℃-200 ℃ are incubated 10-30 minute in the atmosphere, are 1～8% O subsequently at water vapor pressure
2In the atmosphere, with the speed greater than 10 ℃/min be warmed up to 400～℃ 450 ℃, and be incubated 0～30 minute, cool to room temperature with stove subsequently, as shown in Figure 1.In order to obtain thicker film, can repeat above-mentioned " coating-thermolysis " process several times.
Through after the thermolysis, just can obtain the mineral membrane of any surface finish, carry out subordinate phase thermal treatment subsequently: at first, is in the oxygen-nitrogen mixture body of 0.01-5% with the mineral membrane after the thermolysis in oxygen level, being rapidly heated 750 ℃～850 ℃, is to be incubated 1～6 hour under 1～8% the condition at water vapor pressure.Subsequently, keep the oxygen level of atmosphere constant, atmosphere is switched to the exsiccant oxygen-nitrogen mixture.Continue insulation after 10-30 minute, cool to 550 ℃, gas is switched to pure O with stove
2, and, cool to room temperature with stove at last, as shown in Figure 2 450 ℃ of insulations 2-8 hour.
Be the specific embodiment that the contriver provides below.
Embodiment 1:
The acetic acid yttrium is dissolved in the methyl alcohol, adds diethylenetriamine, make the mol ratio of each component be: acetic acid yttrium: methyl alcohol: diethylenetriamine=1: 27: 1.5 forms solution A after stirring clarification.
Barium acetate is dissolved in the mixed solution that contains water and trifluoroacetic acid, makes barium acetate: water: trifluoroacetic acid=1: 40: 3.After the stirring and dissolving,, be dissolved in again in the methanol solution, make mol ratio Ba through gained material after 80 ℃ of oven dry
2+: methyl alcohol=1: 20 obtains solution B after the stirring clarification.
Neutralized verdigris is dissolved in the methyl alcohol, adds a spot of α-Jia Jibingxisuan, make neutralized verdigris: methyl alcohol: α-Jia Jibingxisuan=1: 22: 2, stir the back through low-grade fever and form solution C.
Above-mentioned solution A, B, C are mixed, stir, make Y
3+: Ba
2+: Cu
2+=1: 2: 3.2, form needed colloidal sol.
Utilize this colloidal sol, in monocrystalline LAO (001) substrate, under the room temperature condition, apply the layer of gel film with dip-coating method.Subsequently, film is at exsiccant O
2150-200 ℃ is incubated 10～30 minutes in the atmosphere, is 4% O then at water vapor pressure
2In the atmosphere, be warmed up to 450 ℃ with the speed of 15 ℃/min, and be incubated 10 minutes.Subsequently with the gained mineral membrane, in oxygen level is 2% oxygen-nitrogen mixture body, be rapidly heated 780 ℃, at water vapour content insulation 2 hours under 4% the condition.Subsequently, keep the oxygen level of atmosphere constant, atmosphere is switched to the exsiccant oxygen-nitrogen mixture.Continue insulation after 30 minutes, cool to 550 ℃, gas is switched to do O with stove
2, and 450 ℃ the insulation 3 hours, cool to room temperature with stove at last after, can obtain the ybco film that critical transition temperature is 90K.
Embodiment 2:
The acetic acid yttrium is dissolved in the methyl alcohol, adds diethylenetriamine, make the mol ratio of each component be: acetic acid yttrium: methyl alcohol: diethylenetriamine=1: 25: 1.5 forms solution A after stirring clarification.
Barium acetate is dissolved in the mixing solutions of water and trifluoroacetic acid, makes barium acetate: water: trifluoroacetic acid=1: 40: 3 after the stirring and dissolving, through 75 ℃ of oven dry, forms thick glass state material.And be dissolved in again in the methanol solution, make mol ratio Ba
2+: methyl alcohol=1: 16 obtains solution B after the stirring clarification.
With the neutralized verdigris is raw material, is dissolved in the methyl alcohol, adds a spot of propionic acid, makes neutralized verdigris: methyl alcohol: propionic acid=1: 25: 3, stir the back through low-grade fever and form solution C.
Above-mentioned three kinds of solution A, B, C are mixed, stir, make Y
3+: Ba
2+: Cu
2+=1: 2: 4, form required colloidal sol.Above-mentioned neutralized verdigris available hydrogen cupric oxide substitutes.
Utilize the colloidal sol of method for preparing, by dip-coating method, at the LaAlO of (010) orientation
3Single crystal substrates on apply the layer of gel film.Under the oxygen protection, gel-film is 4% O at water vapour content 200 ℃ of insulations 10 minutes subsequently
2In the atmosphere, be warmed up to 400 ℃ with the heat-up rate of 10 ℃/min, and be incubated 10 minutes, take out the cold back of stove.Repeat above-mentioned " coating-thermolysis " technology 2 times again, to increase the thickness of film.Subsequently, with the mineral membrane that obtains be 1% N in oxygen level
2/ O
2In the mixed atmosphere, be rapidly heated 750 ℃, and switch to the same gas of containing water vapor 4%, and be incubated 2 hours.After insulation finished, it was 1% exsiccant N that gas is switched to oxygen level
2/ O
2Gas mixture when cooling to 550 ℃ with stove, switches to dried O with gas
2, cool to 450 ℃ of insulations 4 hours, after insulation end stove is chilled to room temperature, promptly obtain the ybco film that the superconduction critical transition temperature is 88K.
Embodiment 3:
The acetic acid yttrium is dissolved in the methyl alcohol, adds diethylenetriamine, make the mol ratio of each component be: acetic acid yttrium: methyl alcohol: diethylenetriamine=1: 20: 1.5 forms solution A after stirring clarification.
Barium acetate is dissolved in the mixing solutions of water and trifluoroacetic acid, makes barium acetate: water: trifluoroacetic acid=1: 50: 4 after the stirring and dissolving, through 75 ℃ of oven dry, forms thick glass state material.And be dissolved in again in the methanol solution, make mol ratio Ba
2+: methyl alcohol=1: 15 obtains solution B after the stirring clarification.
With the neutralized verdigris is raw material, is dissolved in the ethanol, adds a spot of α-Jia Jibingxisuan, makes neutralized verdigris: methyl alcohol: α-Jia Jibingxisuan=1: 25: 3, stir the back through low-grade fever and form solution C.
With above-mentioned three kinds of solution A, B, C mix, and stir, and make Y
3+: Ba
2+: Cu
2+=1: 2: 3.4, form required colloidal sol.
Utilize the colloidal sol of method for preparing, by spin-coating method or dip-coating method, at the LaAlO of (010) orientation
3Single crystal substrates on, apply the layer of gel film.Under the oxygen protection, gel-film is 4% O at water vapour content 200 ℃ of insulations 10 minutes subsequently
2In the atmosphere, be warmed up to 400 ℃ with the heat-up rate of 10 ℃/min, and be incubated 10 minutes, take out the cold back of stove.Repeat above-mentioned " coating-thermolysis " technology 1 time again, to increase the thickness of film.Subsequently, with the mineral membrane that obtains be 2% N in oxygen level
2/ O
2In the mixed atmosphere, be rapidly heated 750 ℃, and to switch to containing water vapor content be 4% same gas, slowly be warmed up to 780 ℃, and be incubated 70 hours.After insulation finishes last 10 minutes, it is 2% exsiccant N that gas is switched to oxygen level
2/ O
2Gas mixture when cooling to 550 ℃ with stove, switches to dried O with gas
2, cool to 450 ℃ of insulations 4 hours, after insulation end stove is chilled to room temperature, take out sample.The superconducting transition temperature of gained sample is 80K.
Embodiment 4:
The acetic acid yttrium is dissolved in the ethanol, adds diethylenetriamine, make the mol ratio of each component be: acetic acid yttrium: ethanol: diethylenetriamine=1: 25: 2 forms solution A after stirring clarification.
Barium acetate is dissolved in the mixing solutions of water and trifluoroacetic acid, makes barium acetate: water: trifluoroacetic acid=1: 50: 4 after the stirring and dissolving, through 75 ℃ of oven dry, forms thick glass state material.And be dissolved in again in the ethanolic soln, make mol ratio Ba
2+: ethanol=1: 20 obtains solution B after the stirring clarification.
With the neutralized verdigris is raw material, is dissolved in the ethanol, adds a spot of propionic acid, makes neutralized verdigris: methyl alcohol: propionic acid=1: 20: 3, stir the back through low-grade fever and form solution C.
Above-mentioned three kinds of solution A, B, C are mixed, stir, make Y
3+: Ba
2+: Cu
2+=1: 2: 3.6, form required colloidal sol.
Utilize the colloidal sol of method for preparing, by spin-coating method or dipping, at the LaAlO of (010) orientation
3Single crystal substrates on, apply the layer of gel film.Under the oxygen protection, gel-film is 4% O at water vapour content 200 ℃ of insulations 10 minutes subsequently
2In the atmosphere, be warmed up to 400 ℃ with the heat-up rate of 10 ℃/min, and be incubated 10 minutes, take out the cold back of stove.Repeat above-mentioned " coating-thermolysis " technology 2 times again, to increase the thickness of film.Subsequently, be 2% with the mineral membrane that obtains in oxygen level, water vapour content is 3% N
2/ O
2In the mixed atmosphere, be rapidly heated 800 ℃, and be incubated 2 hours.After insulation finishes, gas is switched to dried O
2, cool to 450 ℃ of insulations 4 hours, after insulation end stove is chilled to room temperature, take out sample.The superconducting transition temperature of gained sample is 87K.
Embodiment 5:
The acetic acid yttrium is dissolved in the ethanol, adds diethylenetriamine, make the mol ratio of each component be: acetic acid yttrium: ethanol: diethylenetriamine=1: 25: 1.5 forms solution A after stirring clarification.
Barium acetate is dissolved in the mixing solutions of water and trifluoroacetic acid, makes barium acetate: water: trifluoroacetic acid=1: 60: 5 after the stirring and dissolving, through 75 ℃ of oven dry, forms thick glass state material.And be dissolved in again in the ethanolic soln, make mol ratio Ba
2+: ethanol=1: 25 obtains solution B after the stirring clarification.
With the neutralized verdigris is raw material, is dissolved in the ethanol, adds a spot of α-Jia Jibingxisuan, makes neutralized verdigris: ethanol: α-Jia Jibingxisuan=1: 25: 3, stir the back through low-grade fever and form solution C.
With above-mentioned three kinds of solution A, B, C mix, and stir, and make Y
3+: Ba
2+: Cu
2+=1: 2: 3.2, form required colloidal sol.
Utilize the colloidal sol of method for preparing, by spin-coating method or dipping, at the LaAlO of (010) orientation
3Single crystal substrates on, apply the layer of gel film.Under the oxygen protection, gel-film is 4% O at water vapour content 200 ℃ of insulations 10 minutes subsequently
2In the atmosphere, be warmed up to 400 ℃ with the heat-up rate of 10 ℃/min, and be incubated 10 minutes, take out the cold back of stove.Repeat above-mentioned " coating-thermolysis " technology 1 time again, to increase the thickness of film.Subsequently, be 1% with the mineral membrane that obtains in oxygen level, water vapour content is 4% N
2/ O
2In the mixed atmosphere, be rapidly heated 800 ℃, and be incubated 2 hours.After insulation finishes, gas is switched to dried O
2, cool to 450 ℃ of insulations 4 hours, after insulation end stove is chilled to room temperature, take out sample.The superconducting transition temperature of gained sample is 86K.
Diethylenetriamine in the foregoing description can be substituted by thanomin or di-alcohol or trolamine.
The foregoing description is some preferable examples, according to technical scheme of the present invention, the foregoing description can also be enumerated a lot, does not enumerate one by one at this, as long as at sol material of the present invention and proportional range thereof, all can obtain the colloidal sol that Yt-Ba-Cu-O high-temperature superconductive film is used.
Claims (3)
1. colloidal sol that Yt-Ba-Cu-O high-temperature superconductive film is used, it is characterized in that, make this colloidal sol raw materials of effective components and mol ratio thereof and be: acetic acid yttrium: barium acetate: neutralized verdigris or copper hydroxide: trifluoroacetic acid: water: α-Jia Jibingxisuan or propionic acid: diethylenetriamine or thanomin or diethanolamine or trolamine: methyl alcohol or ethanol=1: 2: (3～4): (4～10): (20～160): (6～40): (1.5～5): (60～240).
2, realize the preparation method of the colloidal sol that the Yt-Ba-Cu-O high-temperature superconductive film of claim 1 is used, it is characterized in that, comprise the following steps:
1) raw material and mol ratio thereof are: acetic acid yttrium: barium acetate: neutralized verdigris or copper hydroxide: trifluoroacetic acid: water: α-Jia Jibingxisuan or propionic acid: diethylenetriamine or thanomin or diethanolamine or trolamine: methyl alcohol or ethanol=and 1: 2: (3～4): (4～10): (20～160): (6～40): (1.5～5): (60～240);
2) the acetic acid yttrium is dissolved in methyl alcohol or the ethanol, add a small amount of diethylenetriamine or thanomin or diethanolamine or trolamine, make the acetic acid yttrium: methyl alcohol or ethanol: diethylenetriamine or thanomin or diethanolamine or trolamine=1: (10～40): (1.5～5) form solution A after stirring;
3) barium acetate is dissolved in the mixing solutions that contains water and trifluoroacetic acid, make barium acetate: water: trifluoroacetic acid=1: (10～80): (2～5), after the stirring and dissolving, through 65 ℃～85 ℃ oven dry, products therefrom is dissolved in methyl alcohol or the ethanolic soln, makes mol ratio Ba
2+: methyl alcohol or ethanol=1: (10～40) obtain solution B;
4) neutralized verdigris or copper hydroxide are dissolved in methyl alcohol or the ethanol, add a spot of α-Jia Jibingxisuan or propionic acid, make neutralized verdigris or copper hydroxide: methyl alcohol or ethanol: α-Jia Jibingxisuan or propionic acid=1: (10～40): (2～10), stir the back through low-grade fever and form solution C;
5) with above-mentioned steps 2)～solution A that step 4) obtains, B, C mix, and stirs, and makes the mol ratio of yttrium, barium, copper three metal ion species be: Y
3+: Ba
2+: Cu
2+=1: 2: (3～4) can obtain required colloidal sol.
3. the preparation method of a high-temperature superconducting thin film is characterized in that, this method comprises the following steps:
1) colloidal sol that adopts the Yt-Ba-Cu-O high-temperature superconductive film of claim 1 to use is precursor liquid, is coated on the lanthanuma luminate single crystal substrate in conjunction with dip-coating method or spin-coating method, can obtain gel film;
2) again the prepared gel film is carried out the thermal treatment of following mode:
A. the gel-film that obtains is carried out fs thermal treatment, i.e. thermal decomposition process, its method is: at exsiccant O
2150 ℃-200 ℃ are incubated 10-30 minute in the atmosphere, are 1～8% O subsequently at water vapor pressure
2In the atmosphere, be warmed up to 400 ℃～450 ℃ with speed, and be incubated 0～30 minute, cool to room temperature with stove subsequently greater than 10 ℃/min;
B. the film after will handling through above-mentioned steps A is in the oxygen-nitrogen mixture body of 0.01-5% in oxygen level, be rapidly heated 750 ℃～850 ℃, be to be incubated 1～6 hour under 1～8% the condition at water vapor pressure, subsequently, keep the oxygen level of atmosphere constant, atmosphere is switched to the exsiccant oxygen-nitrogen mixture, continue insulation after 10-30 minute, cool to 550 ℃ with stove, gas is switched to pure O
2, and, cool to room temperature with stove at last 450 ℃ of insulations 2-8 hour, can obtain the superconducting thin film of critical temperature 80～90K.
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| CN102603283B (en) * | 2012-03-15 | 2013-09-25 | 江苏天诚线缆集团有限公司 | Method for preparing high-temperature superconducting gadolinium-barium-copper-oxygen thin film by utilizing chemical solution method |
| CN102627453B (en) * | 2012-04-23 | 2014-08-13 | 清华大学 | Method for preparing yttrium barium copper oxide high-temperature superconducting film by using non-water-based chemical solution |
| CN103265279A (en) * | 2013-05-13 | 2013-08-28 | 北京工业大学 | V-doped YBCO (Yttrium Barium Copper Oxide) superconducting thin film and preparation method thereof |
| CN103436865B (en) * | 2013-08-07 | 2015-12-02 | 西安理工大学 | Polymer assists fluorine-containing solution to prepare the method for high-temperature superconducting thin film |
| CN106098242A (en) * | 2016-06-28 | 2016-11-09 | 郭迎庆 | A kind of method that high temperature superconducting materia is prepared in classification short annealing modification |
| CN107619274B (en) * | 2017-09-06 | 2020-11-20 | 西安理工大学 | Method for preparing yttrium barium copper oxide high-temperature superconducting film by utilizing rapid heat treatment |
| CN108383502B (en) * | 2018-02-10 | 2021-08-17 | 浩发环保科技（深圳）有限公司 | Yttrium barium copper oxide ceramic film with conductive function, preparation method thereof and titanium-based yttrium barium copper oxide ceramic electrode of flow battery |
| CN108611624A (en) * | 2018-04-03 | 2018-10-02 | 北京鼎臣世纪超导科技有限公司 | A kind of method of quick preparation high-performance ReBCO high-temperature superconducting thin films |
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| CN1209424A (en) * | 1998-07-15 | 1999-03-03 | 西北有色金属研究院 | Process for preparing superconductive powder of yttrium-barium-copper oxygen |
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| CN101694789B (en) * | 2009-10-16 | 2011-04-20 | 北京工业大学 | Ti-doped YBCO film preparation process |
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